"Despite the head start that KDE enjoyed, the large number of KDE users and developers, and Linus Torvalds personally endorsing KDE, GNOME has won the desktop environment battle. The final victory came with the third piece of a corporate trifecta, giving GNOME the official nod from Red Hat, Sun Microsystems, and finally Novell. The question is, will the triumph of GNOME lead to the rise or downfall of the Linux desktop?" Run Forrest! Run!

QT apps that are distributed outside of the organization in which they are developed in that the company wishes to keep closed source, need a paid qt license. A company can develop an app for internal use using qt, and so long as it doesn't get distributed outside the company, the gpl does not apply.